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Abstract
Due to the restriction of chain segment mobility by solid particles, it remained challenging to ensure self-healing capabilities while meeting the mechanical performance requirements of highly filled materials. In this study, a series of “solid-liquid” dynamic polymers based on boronic ester bond were designed, and applying effects in high fill environments were investigated. The highly crosslinked borate dynamic network structure can provide remarkable rheological relaxation capabilities under static conditions and mechanical resistance under stress, so that combination of mechanical properties and rheological relaxation capabilities can be achieved. The polymer exhibited a tendency to “flow” under static conditions while maintaining tensile modulusof1.8 MPa under stress. Application validation results showed that the simulated propellant sample with 80% solid content based on this polymer, could fully self-heal and demonstrated a significant tensile strength. Our research provided new insights for the development of multifunctional highly filled materials.
Published Version
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